A new video released by the terror group ISIS purports to show a young boy coldly executing two men who the terror group claims were Russian spies.

The video, apparently produced by an ISIS media outlet and shared on Twitter, is seven minutes long and features “confessions” by the two men. In a heavily-edited section, the young boy, called a “lion’s cub,” is shown firing a pistol at the heads of the men, who each fall, apparently lifeless.

A U.S. government official declined to comment on the authenticity of the video, and some observers online have noted that the event could have been staged. A former counter-terrorism official told ABC News, however, that the actual alleged murders appeared real enough to him. Russian officials declined to comment, according to international reports.

ISIS is not the first group to use children for gruesome propaganda, as just 11 days ago the Talibanreleased a video showing a much younger boy justifying that terror group’s campaign of violence in Pakistan.